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104 lines
2.6 KiB
104 lines
2.6 KiB
4 months ago
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "component_loader/DllLoader.h"
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#include <android-base/logging.h>
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#include <dlfcn.h>
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namespace android {
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namespace vts {
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DllLoader::DllLoader() : handle_(NULL) {}
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DllLoader::~DllLoader() {
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if (!handle_) {
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dlclose(handle_);
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handle_ = NULL;
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}
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}
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void* DllLoader::Load(const char* file_path) {
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if (!file_path) {
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LOG(ERROR) << "file_path is NULL";
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return NULL;
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}
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// consider using the load mechanism in hardware/libhardware/hardware.c
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handle_ = dlopen(file_path, RTLD_LAZY);
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if (!handle_) {
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LOG(ERROR) << "Can't load a shared library, " << file_path
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<< ", error: " << dlerror();
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return NULL;
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}
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LOG(DEBUG) << "DLL loaded " << file_path;
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return handle_;
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}
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loader_function DllLoader::GetLoaderFunction(const char* function_name) const {
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return (loader_function)LoadSymbol(function_name);
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}
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loader_function_with_arg DllLoader::GetLoaderFunctionWithArg(
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const char* function_name) const {
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return (loader_function_with_arg)LoadSymbol(function_name);
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}
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bool DllLoader::SancovResetCoverage() {
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void (*func)() = (void (*)())LoadSymbol("__sanitizer_reset_coverage");
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if (func == NULL) {
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return false;
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}
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func();
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return true;
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}
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bool DllLoader::GcovInit(writeout_fn wfn, flush_fn ffn) {
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void (*func)(writeout_fn, flush_fn) =
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(void (*)(writeout_fn, flush_fn))LoadSymbol("llvm_gcov_init");
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if (func == NULL) {
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return false;
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}
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func(wfn, ffn);
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return true;
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}
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bool DllLoader::GcovFlush() {
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void (*func)() = (void (*)()) LoadSymbol("__gcov_flush");
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if (func == NULL) {
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return false;
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}
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func();
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return true;
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}
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void* DllLoader::LoadSymbol(const char* symbol_name) const {
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const char* error = dlerror();
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if (error != NULL) {
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LOG(ERROR) << "Existing error message " << error << "before loading "
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<< symbol_name;
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}
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void* sym = dlsym(handle_, symbol_name);
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if ((error = dlerror()) != NULL) {
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LOG(ERROR) << "Can't find " << symbol_name << " error: " << error;
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return NULL;
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}
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return sym;
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}
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} // namespace vts
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} // namespace android
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